By M. Khatib
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Extra resources for Advanced Trends in Wireless Communications
S. Collonge, G. Zaharia and G. EL Zein (2004). Influence of Human Acitivity on Wideband Characteristics of the 60 GHz Indoor Radio Channel, IEEE Transactions on Wireless Communications, Vol. 3, No. 6: 2396-2406. P. F. M. Smulders (2009). Statistical Characterization of 60 GHz Indoor Radio Channels, IEEE Transactions on Antennas and Propagation, Vol. 57, No. 10 (October 2009): 28202829. N. Moraitis and P. Constantinou (2004). Indoor Channel Measurements and Characterization at 60 GHz for Wireless Local Area Network Applications, IEEE Transactions on Antennas and Propagation, Vol.
2 Receiver design The receive antenna, identical to the transmit horn antenna, is connected to a band-pass filter (59-61 GHz). 5 GHz and fed into a band-pass filter with a bandwidth of 2 GHz. An automatic gain control (AGC) with 20 dB dynamic ranges is used to ensure a quasi-constant signal level at the demodulator input when, for example, the Tx-Rx distance varies. The AGC loop consists of Indoor Channel Characterization and Performance Analysis of a 60 GHz near Gigabit System for WPAN Applications 33 a variable gain amplifier, a power detector and a circuitry using a baseband amplifier to deliver the AGC voltage.
In the hallway, the door and walls can cause reflections and diffractions of the transmitted signal, in particular when the Rx position is far away from the opening door (as Rx1 position shown in Fig. 24). We found that for the same 32 m Tx-Rx distance, the received signal power was similar for both positions Tx1-Rx1 and Tx2-Rx2. 8*10-5 for Tx1-Rx1 and Tx2Rx2 positions, respectively. In the case of Tx1-Rx1 position, diffractions and reflections from the borders of the opening door can be the dominant contributors to the significant BER degradation.
Advanced Trends in Wireless Communications by M. Khatib